<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>

<script src="lib/vue-2.4.0.js"></script>

</head>

<body>

     <div id="app">
        <a href="#" @click.prevent="show=true">登录</a>
        <a href="#" @click.prevent="show=false">注册</a>
        <login v-if='show'></login>
        <register v-else='show'></register>
    </div>


     <script>
         Vue.component('login',{
            template:'<h3>登录</h3>'
         })
         Vue.component('register',{
            template:'<h3>注册</h3>'
         })
        var vm = new Vue({
             el : '#app',
             data : {
             msg :'' ,
             show:true,
            }
        }) 

     </script>

</body>

</html>